Abstract
The observer pattern creates a one-to-many, unidirectional relationship between a source object and a set of observers. The observers receive a notification message whenever a property of the source object changes. The observerscan use this information to stay in synchronization with the observed, object or perform additional tasks.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Rights and permissions
Copyright information
© 2009 James Bucanek
About this chapter
Cite this chapter
(2009). Observer Pattern. In: Learn Objective-C for Java Developers. Apress. https://doi.org/10.1007/978-1-4302-2370-2_19
Download citation
DOI: https://doi.org/10.1007/978-1-4302-2370-2_19
Publisher Name: Apress
Print ISBN: 978-1-4302-2369-6
Online ISBN: 978-1-4302-2370-2
eBook Packages: Professional and Applied ComputingApress Access BooksProfessional and Applied Computing (R0)